(AP) — A 4-mile stretch of beach in south Los Angeles County was closed Thursday after tar balls washed ashore — the latest Southern California coastline to shut down due to oily goo, authorities said. The Long Beach Fire Department ordered the closure Wednesday night over concerns the material could cause skin irritation or other adverse health effects. The Coast Guard determined there was no need to close the beach and suggested letting the tar balls dissipate naturally, city officials said.